package com.lzymall.common;

import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import lombok.extern.slf4j.Slf4j;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.concurrent.TimeUnit;

/**
 * @Author: lizhenyao
 * @Desciption:
 */
@Slf4j
public class TokenCache {


    public static final String TOKEN_PREIX = "token";

    //LUA算法
    private static LoadingCache<String, String> loadingCache = CacheBuilder.newBuilder().initialCapacity(1000).maximumSize(10000).expireAfterAccess(12, TimeUnit.HOURS)
            .build(new CacheLoader<String, String>() {
                //默认的数据加载实现,当调用get取值的时候,如果key没有对应的值,就调用这个方法进行加载
                @Override
                public String load(String s) throws Exception {
                    //避免空指针
                    return "null";
                }
            });
    public static void setKey(String key, String value){
        loadingCache.put(key, value);
    }

    public static String getKey(String key){
        String value = null;
        try {
            value = loadingCache.get(key);
            if ("null".equals(value)){
                return null;
            }
            return value;
        }catch (Exception e){
            log.error("localCache get error", e);
        }
        return null;
    }

}
